from flask import render_template, current_app, jsonify, session, g, abort, request

from info import constants, db
from info.models import News, User, Comment, CommentLike
from info.modules.news import news_blu
from info.utils.common import user_login_data
from info.utils.response_code import RET


@news_blu.route("/comment_like",methods=["POST"])
@user_login_data
def comment_like():
    '''评论点赞'''
    user = g.user
    if not user:
        return jsonify(errno=RET.SESSIONERR, errmsg="用户未登录")

    comment_id = request.json.get("comment_id")
    news_id = request.json.get("news_id")
    action = request.json.get("action")

    if not all([comment_id,news_id,action]):
        return jsonify(errno=RET.PARAMERR,errmsg="参数错误")

    if action  not  in (["add","remove"]):
        return jsonify(errno=RET.PARAMERR,errmsg="参数错误")

    try:
        comment_id = int(comment_id)
        news_id = int(news_id)
    except Exception as e:
        current_app.logger.error(e)
        return jsonify(errno=RET.PARAMERR,errmsg="参数错误")

    try:
        comment = Comment.query.get(comment_id)
    except Exception as e:
        current_app.logger.error(e)
        return jsonify(errno=RET.DBERR,errmsg="数据查询错误")

    if not comment:
        return jsonify(errno=RET.NODATA,errmsg="评论不存在")

    if action=="add":
        comment_like_model = CommentLike.query.filter(CommentLike.user_id == user.id,
                                                      CommentLike.comment_id == comment.id).first()
        if not comment_like_model:
            comment_like_model = CommentLike()
            comment_like_model.user_id = user.id
            comment_like_model.comment_id = comment.id

    else:
        comment_like_model = CommentLike.query.filter(CommentLike.user_id == user.id,CommentLike.comment_id == comment.id).first()
        if comment_like_model:
            db.session.delete(comment_like_model)

    try:
        db.session.add(comment_like_model)
        db.session.commit()
    except Exception as e:
        db.session.rollback()
        current_app.logger.error(e)
        return jsonify(errno=RET.DBERR,errmsg="数据查询错误")
    return jsonify(errno=RET.OK,errmsg="ok")

@news_blu.route("/news_comment",methods=["POST"])
@user_login_data
def comment_news():
    '''
        评论新闻或者回复某条新闻下的指定评论
    :return:
    '''
    user = g.user
    if not user:
        return jsonify(errno=RET.SESSIONERR,errmsg="用户未登录")
#     取到新闻参数
    news_id = request.json.get("news_id")
    comment_comment = request.json.get("comment")
    parent_id = request.json.get("parent_id")

    if not all([news_id,comment_comment]):
        return jsonify(errno=RET.PARAMERR,errmsg="参数错误")

    try:
        news_id = int(news_id)
        if parent_id:
            parent_id = int(parent_id)
    except Exception as e:
        current_app.logger.error(e)
        return jsonify(errno=RET.PARAMERR,errmsg="参数错误")

#     初始化评论模型
    comment = Comment()

    comment.user_id = user.id
    comment.news_id = news_id
    comment.content = comment_comment
    if parent_id:
        comment.parent_id = parent_id
    #     添加数据库
    try:
        db.session.add(comment)
        db.session.commit()
    except Exception as e:
        current_app.logger.error(e)
        db.session.rollback()

    return jsonify(errno=RET.OK, errmsg="ok", data=comment.to_dict())

@news_blu.route("/news_collect",methods=["POST"])
@user_login_data
def collect_news():
    '''
        接受参数
        判断参数

    :return:
    '''
    user = g.user
    if not user:
        return jsonify(errno=RET.SESSIONERR,errmsg="用户未登录")
    news_id = request.json.get("news_id")
    action = request.json.get("action")

    if not all([news_id, action]):
        return jsonify(errno=RET.PARAMERR,errmsg="参数错误")

    if action not in ["collect","cancel_collect"]:
        return jsonify(errno=RET.PARAMERR,errmsg="参数错误")

    try:
        news_id = int(news_id)
    except Exception as e:
        current_app.logger.error(e)
        return jsonify(errno=RET.PARAMERR,errmsg="参数错误")

    # news = None
    try:
        news = News.query.get(news_id)
    except Exception as e:
        current_app.logger.error(e)
        return jsonify(errno=RET.DBERR,errmsg="数据查询错误")
    if not news:
        return jsonify(errno=RET.NODATA,errmsg="未查询到数据")


    if action == "cancel_collect":
        if news in user.collection_news:
            user.collection_news.remove(news)
    else:
        if news not in user.collection_news:
            user.collection_news.append(news)

    return jsonify(errno=RET.OK,errmsg="操作成功")



@news_blu.route("/<int:news_id>")
@user_login_data
def news_detail(news_id):
    '''
        新闻详情
    :param news_id:
    :return:
    '''
    news_list = []
    try:
        news_list = News.query.order_by(News.clicks.desc()).limit(constants.CLICK_RANK_MAX_NEWS)
    except Exception as e:
        current_app.logger.error(e)
        return jsonify(errno=RET.DATAERR,errmsg="查询失败")
    news_dict_li = []
    for news in news_list:
        news_dict_li.append(news.to_dict())

    user = g.user

    news = None
    try:
        news = News.query.get(news_id)
    except Exception as e:
        current_app.logger.error(e)

    if not news:
        abort(404)
    news.clicks += 1

    is_collected = False
    if user:
        if news in user.collection_news:
            is_collected = True
    comments = []
    try:
        comments = Comment.query.filter(Comment.news_id ==news_id).order_by(Comment.create_time.desc()).all()
    except Exception as e:
        current_app.logger.error(e)

    comment_likes_ids = []
    if g.user:
    # 查询当前用户在当前新闻里面的所有评论--- 取到所有评论的id
        try:
            comment_ids = [comment.id for comment in comments]

    # 查询comment_id 在上面 在第一步查询列表内的所有数据
            comment_likes = CommentLike.query.filter(CommentLike.comment_id.in_(comment_ids), CommentLike.user_id == g.user.id)

            comment_likes_ids = [comment_like.comment_id for comment_like in comment_likes]
        except Exception as e:
            current_app.logger.error(e)

    comment_dict_li = []

    for comment in comments:
        comment_dict = comment.to_dict()
        comment_dict["is_like"] = False
        if comment.id in comment_likes_ids:
            comment_dict["is_like"] = True
        comment_dict_li.append(comment_dict)
    data = {
        "news_dict_li": news_dict_li,
        "user": user.to_dict() if user else None,
        "news": news.to_dict(),
        "is_collected":is_collected,
        "comments":comment_dict_li,

    }
    return render_template('news/detail.html',data=data)
